You can also check whether this servlet is not being included in multiple bundles http://localhost:4502/system/console/components and search for your servlet.

This is not an error it's a warning.If you are getting  500 error that means you are able to hit the servlet and you are getting 500 error at some specific line can you let us know that specific code.

Today i too faced this issue in my local instance and i was able to resolve this  after following below steps-1. Deleted launchpad folder2. Start the server3. Delete cookies from the browser or close the browser and try to access the server4. Able to login to the server

Please use this just made it work in my local instance-<plugin><groupId>org.apache.felix</groupId><artifactId>maven-bundle-plugin</artifactId><extensions>true</extensions><configuration><instructions><Embed-Dependency>elasticsearch,elasticsearch-rest-client,elasticsearch-rest-high-level-client</Embe...

Few stuff to look for-1. is your bundle active?2. If it's not active could you please check the dependencies missing?3. If they are elastic search could you please install elastic search bundles directly to system/console4. But we should be directly embedding the dependencies directly with the bundl...

What's the error?

Values are getting saved properly -i think you need to update your dialog as below- <content        jcr:primaryType="nt:unstructured"        sling:resourceType="granite/ui/components/foundation/container">        <layout            jcr:primaryType="nt:unstructured"            sling:resourceType="gra...

Is maxlength a multifield?Could you please be more clear like what you are trying to achieve here.Also could you please upload cq dialog.xml.

Please refer below -https://labs.tadigital.com/index.php/2018/04/23/generating-pdf-from-html-in-adobe-experience-manager-6-1/

Hope you have seen this -Integrate Responsive GridAEM ships with an edit mode called Layout mode which when enabled allows authors to re-size components and containers to optimize content on different device widths. This feature is baked into the SPA Editing capabilities. The only action needed is t...